Finding the Fourth Proportional to 100,079.15, 138,107.99 and 57,057.26
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Solution
The fourth proportional to 100,079.15, 138,107.99 and 57,057.26 is: 78,738.32
Step by Step Solution
- Step 1: Write the proportion equation
100,079.15 : 138,107.99 = 57,057.26 : x - Step 2: Convert to fraction form
100,079.15/138,107.99 = 57,057.26/x - Step 3: Cross multiply
100,079.15x = 138,107.99 × 57,057.26 - Step 4: Simplify right side
100,079.15x = 7,880,063,401.52 - Step 5: Solve for x
x = 7,880,063,401.52/100,079.15 - Step 6: Final answer
x = 78,738.32
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.